My older sister, who always treats me like a child, peeled off the foreskin of my phimotic penis... Satsuki Mei ROYD-098

A beautiful older sister, much older than her brother, treats him like a child, even though he's already a high school student! She enters the bathroom uninvited to help him shower, and upon seeing his phimotic penis, she helps him pull back the foreskin to clean it...